EP1972860A2 - Vorrichtung zur Abgabe von heißem Wasser - Google Patents

Vorrichtung zur Abgabe von heißem Wasser Download PDF

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Publication number
EP1972860A2
EP1972860A2 EP08102049A EP08102049A EP1972860A2 EP 1972860 A2 EP1972860 A2 EP 1972860A2 EP 08102049 A EP08102049 A EP 08102049A EP 08102049 A EP08102049 A EP 08102049A EP 1972860 A2 EP1972860 A2 EP 1972860A2
Authority
EP
European Patent Office
Prior art keywords
hot
water
hot water
temperature
water tank
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP08102049A
Other languages
English (en)
French (fr)
Other versions
EP1972860A3 (de
Inventor
Satoshi Ida
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanden Corp
Original Assignee
Sanden Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sanden Corp filed Critical Sanden Corp
Publication of EP1972860A2 publication Critical patent/EP1972860A2/de
Publication of EP1972860A3 publication Critical patent/EP1972860A3/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/02—Domestic hot-water supply systems using heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1051—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water
    • F24D19/1054—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water the system uses a heat pump

Definitions

  • the present invention relates to a hot water supply apparatus for supplying hot water conditioned to a predetermined temperature by mixing hot water stored in a hot-water tank with water to be supplied.
  • a hot water supply apparatus including: a heater for heating water to be supplied; a hot-water tank for storing hot water heated by the heater; and a mixing valve for obtaining hot water to be supplied by mixing hot water stored in the hot-water tank with water to be supplied.
  • a hot water supply apparatus includes: a heater for heating water to be supplied; a hot-water tank for storing hot water heated by the heater; a mixing valve for mixing hot water stored in the hot-water tank with water to be supplied; a power supply as a power source; a voltage sensor for detecting a voltage of the power supply; a temperature sensor for detecting a temperature of hot water stored in the hot-water tank; and a controller for controlling operation of the mixing valve so as to obtain a predetermined valve opening corresponding to a temperature detected by the temperature sensor when a voltage detected by the voltage sensor is a predetermined voltage or less.
  • a hot water supply apparatus includes: a heater for heating water to be supplied; a hot-water tank for storing hot water heated by the heater; a mixing valve for mixing hot water stored in the hot-water tank with water to be supplied; a hot-water pipe for circulating hot water flowing out of the hot-water tank; a flow switch for detecting presence of circulation of hot water in the hot-water pipe; a temperature sensor for detecting a temperature of hot water stored in the hot-water tank; and a controller for controlling operation of the mixing valve so as to obtain a predetermined valve opening corresponding to a temperature detected by the temperature sensor when the flow switch detects stopping of circulation of hot water in the hot-water pipe.
  • the mixing valve to be operated so as to obtain a predetermined valve opening corresponding to a temperature of hot water stored in the hot-water tank, except in the case of ordinary hot water supply, thus supplying hot water conditioned to a predetermined temperature or less in case of power failure. Accordingly, hot water conditioned to the predetermined temperature or less can be supplied to a user in case of power failure, thus attaining high safety in supplying hot water in case of power failure.
  • FIGS. 1 to 3 are views illustrating a first embodiment of the present invention.
  • the hot water supply apparatus includes: a hot-water tank 10 for storing water for hot water supply; a heat pump unit 20 for heating water stored in the hot-water tank 10; a water supply pipe 30 for supplying water to be supplied into the hot-water tank 10; a hot-water pipe 40 for supplying hot water in the hot-water tank 10 to a bathroom, a kitchen or the like; a circulation circuit 50 for returning, to the hot-water tank 10, water in the hot-water tank 10 heated by the heat pump unit 20; and a controller 60 for controlling an operating condition.
  • the hot-water tank 10 is constructed of a member made of stainless or the like and is formed into a cylindrical shape which has an upper end and a lower end closed and extends vertically. In addition, an appearance of the hot-water tank 10 is covered with a heat insulating material such as glass wool or foamed urethane, so that heat transfer between the inside and outside of the hot-water tank 10 is blocked.
  • a heat insulating material such as glass wool or foamed urethane
  • the heat pump unit 20 includes an electric compressor 21, a gas cooler 22 as a heater, an expansion valve 23 and an evaporator 24, which are sequentially connected through a pipe made of copper, stainless or the like to form a refrigerant circuit.
  • the refrigerant circuit is charged with carbon dioxide as refrigerant so that high-pressure side thereof becomes a supercritical state.
  • the evaporator 24 is mounted with a blower 24a for circulating air to be heat-exchanged with refrigerant.
  • the water supply pipe 30 has a first water supply pipe 31 connected with a lower portion of the hot-water tank 10 and a second water supply pipe 32 connected with a mixing valve described later. Additionally, at the water supply pipe 30 positioned on the upstream side of the first water supply pipe 31 and the second water supply pipe 32, there is provided a pressure reducing valve 33 for reducing the pressure of water supplied from a public water supply to a predetermined pressure for circulation.
  • the hot-water pipe 40 is connected with an upper portion of the hot-water tank 10, and a pressure of water flowing into a lower portion of the hot-water tank 10 from the first water supply pipe 31 permits hot water at the upper portion of the hot-water tank 10 to circulate.
  • the hot-water pipe 40 is connected with the second water supply pipe 32 through an electric mixing valve 41, and hot water flowing out of the hot-water tank 10 is mixed with water flowing through the second water supply pipe 32 for circulation.
  • Operating the mixing valve 41 can change a mixing ratio of hot water at the upper portion of the hot-water tank 10 to water in the second water supply pipe 32, thus supplying hot water conditioned to a desired temperature to a user.
  • the circulation circuit 50 is sequentially connected with the lower portion of the hot-water tank 10, a circulation pump 51, the gas cooler 22 and the upper portion of the hot-water tank 10 through copper or stainless pipe, and the circulation pump 51 permits water at the lower portion of the hot-water tank 10 to pass through the gas cooler 22 and flow into the upper portion of the hot-water tank 10.
  • the controller 60 is formed from a microcomputer and a memory thereof stores programs of operation of the heat pump unit 20 and the mixing valve 41.
  • the controller 60 is connected with a voltage sensor 62 for detecting a power voltage supplied from a power supply 61 as a power source, a temperature sensor 63 for detecting a temperature of hot water stored in the upper portion of the hot-water tank 10 and the mixing valve 41.
  • the controller 60 receives a signal detected by the voltage sensor 62 and transmits an output signal of a valve opening corresponding to a signal detected by the temperature sensor 63 to the mixing valve 41.
  • the compressor 21, the blower 24a and the circulation pump 51 are operated. This permits refrigerant discharged from the compressor 21 to pass through the gas cooler 22 and flow into the evaporator 24 via the expansion valve 23, and refrigerant flowing out of the evaporator 24 to be sucked into the compressor 21.
  • the water at the lower portion of the hot-water tank 10 is circulated in the circulation circuit 50 by the circulation pump 51, heated by heat exchange with refrigerant in the gas cooler 22 and stored in the upper portion of the hot-water tank 10.
  • the compressor 21, the blower 24a and the circulation pump 51 are stopped.
  • hot water at the upper portion of the hot-water tank 10 circulates in the hot-water pipe 40, is mixed with water circulating in the second water supply pipe 32 by the mixing valve 41 and is supplied to the user from the faucet. Consumption of hot water in the hot-water tank 10 allows water in the first water supply pipe 31 to flow into the hot-water tank 10, thus always maintaining the inside of the hot-water tank 10 at a full water level.
  • a voltage V detected by the voltage sensor 62 is a preset voltage V1 or less (step S11)
  • a temperature T detected by the temperature sensor 63 is detected (step S12) and the mixing valve 41 is operated by the electric power before complete power failure so as to obtain a valve opening corresponding to the detected temperature T (step S13).
  • a temperature of hot water supplied to a user changes with a temperature of water circulating in the second water supply pipe 32 and, as the temperature of water circulating in the second water supply pipe 32 is higher, the temperature of hot water to be supplied becomes higher.
  • a temperature of tap water is high (for example, 25°C) in summer or the like
  • a valve opening of the mixing valve 41 is set so that a temperature of hot water to be supplied is a predetermined temperature or less (for example, 43°C or less), thus preventing supply of hot water at high temperature.
  • the mixing valve 41 when a voltage V detected by the voltage sensor 62 is a preset voltage V1 or less, the mixing valve 41 is operated so as to obtain the predetermined valve opening corresponding to the temperature T detected by the temperature sensor 63.
  • FIGS. 4 and 5 illustrate a second embodiment of the present invention.
  • the same configuration portions as the above-described embodiment are indicated with the same symbol.
  • the hot water supply apparatus has a flow switch 64 on the hot-water pipe 40 positioned on the downstream side of the mixing valve 41.
  • the flow switch 64 detecting presence of circulation of hot water in the hot-water pipe 40, is connected with the controller 60 and transmits a detection signal to the controller 60.
  • a voltage V detected by the voltage sensor 62 is the preset voltage V1 or less (step S21) or circulation of hot water is not detected by the flow switch 64 (step S22), a temperature T detected by the temperature sensor 63 is detected (step S23) and the mixing valve 41 is operated so as to obtain a valve opening corresponding to the detected temperature T (step S24).
  • the mixing valve 41 is preset to a valve opening thereof so that a temperature of hot water to be supplied to the user is a predetermined temperature or less, except during ordinary hot water supply.
  • the mixing valve 41 is operated by the electric power before complete power failure in the same way as the first embodiment, so that a temperature of the hot water to be supplied to the user is the predetermined temperature or less.
  • the hot water supply apparatus operates the mixing valve 41 so as to obtain a predetermined valve opening corresponding to a temperature T detected by the temperature sensor 63 when the flow switch 64 detects that circulation of hot water has stopped. Accordingly, even if electric power supply to the mixing valve 41 has stopped in case of power failure, the mixing valve 41 is preset so that a temperature of hot water to be supplied to a user is a predetermined temperature or less, so that hot water at the predetermined temperature or less can be supplied in case of power failure, thus attaining high safety in supplying hot water in case of power failure.
  • the second embodiment has described that the flow switch 64 detects presence of circulation of hot water in the hot-water pipe 40, but the presence of circulation of hot water in the hot-water pipe 40 may be detected by a flow rate sensor in place of the flow switch 64.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
EP08102049A 2007-03-19 2008-02-27 Vorrichtung zur Abgabe von heißem Wasser Withdrawn EP1972860A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007069951A JP2008232478A (ja) 2007-03-19 2007-03-19 給湯装置

Publications (2)

Publication Number Publication Date
EP1972860A2 true EP1972860A2 (de) 2008-09-24
EP1972860A3 EP1972860A3 (de) 2009-09-23

Family

ID=39590863

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08102049A Withdrawn EP1972860A3 (de) 2007-03-19 2008-02-27 Vorrichtung zur Abgabe von heißem Wasser

Country Status (3)

Country Link
US (1) US20080230620A1 (de)
EP (1) EP1972860A3 (de)
JP (1) JP2008232478A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109737608A (zh) * 2018-12-26 2019-05-10 合肥美的暖通设备有限公司 一种阀组件、热水器和阀组件的控制方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI500893B (zh) * 2012-11-16 2015-09-21 Ind Tech Res Inst 熱泵空調系統及其控制方法
JP6065548B2 (ja) * 2012-11-29 2017-01-25 株式会社ノーリツ 貯湯給湯システム

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0306235A2 (de) * 1987-08-31 1989-03-08 Inax Corporation Regeleinrichtung für die Temperatur und den Durchfluss von Wasser
EP0375259A2 (de) * 1988-12-23 1990-06-27 Matsushita Electric Works, Ltd. Warmwasserversorgungssystem
WO1996001396A1 (en) * 1994-07-04 1996-01-18 Nazir Dosani Fluid tempering system
US20050022542A1 (en) * 2003-07-30 2005-02-03 Hisayoshi Sakakibara Heat pump hot water supply system of hot water storage type
WO2005026597A1 (en) * 2003-09-18 2005-03-24 Gsa Industries (Aust.) Pty Ltd Thermostatic safety valve
JP2007071411A (ja) * 2005-09-05 2007-03-22 Matsushita Electric Ind Co Ltd 貯湯式給湯装置
CN101210742A (zh) * 2006-12-30 2008-07-02 顾利平 强制循环热水锅炉用的旁通冷却结构

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US4420811A (en) * 1980-03-03 1983-12-13 Price-Pfister Brass Mfg. Co. Water temperature and flow rate selection display and control system and method
US4750472A (en) * 1984-05-24 1988-06-14 Fazekas Dale J Control means and process for domestic hot water re-circulating system
US4682728A (en) * 1985-08-27 1987-07-28 Oudenhoven Martin S Method and apparatus for controlling the temperature and flow rate of a fluid
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CA2151881A1 (en) * 1995-06-15 1996-12-16 Nazir Dosani Programmable thermostat to reduce bacterial proliferation to prevent legionellosis
US5895565A (en) * 1996-10-04 1999-04-20 Santa Barbara Control Systems Integrated water treatment control system with probe failure detection
CA2200895A1 (en) * 1997-03-25 1998-09-25 Nazir Dosani Fluid tempering system
US6286764B1 (en) * 1999-07-14 2001-09-11 Edward C. Garvey Fluid and gas supply system
US7346274B2 (en) * 1999-07-27 2008-03-18 Bradenbaugh Kenneth A Water heater and method of controlling the same
US6250558B1 (en) * 1999-08-09 2001-06-26 Miguel E. Dogre Cuevas Shower temperature and pressure control system
GB2371634B (en) * 2001-01-30 2005-05-25 Aqualisa Products Ltd Water mixing valve apparatus
CA2492003C (en) * 2001-11-15 2013-03-19 Synapse, Inc. System and method for controlling temperature of a liquid residing within a tank
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US7298968B1 (en) * 2007-01-05 2007-11-20 Rheem Manufacturing Company Pumpless combination instantaneous/storage water heater system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0306235A2 (de) * 1987-08-31 1989-03-08 Inax Corporation Regeleinrichtung für die Temperatur und den Durchfluss von Wasser
EP0375259A2 (de) * 1988-12-23 1990-06-27 Matsushita Electric Works, Ltd. Warmwasserversorgungssystem
WO1996001396A1 (en) * 1994-07-04 1996-01-18 Nazir Dosani Fluid tempering system
US20050022542A1 (en) * 2003-07-30 2005-02-03 Hisayoshi Sakakibara Heat pump hot water supply system of hot water storage type
WO2005026597A1 (en) * 2003-09-18 2005-03-24 Gsa Industries (Aust.) Pty Ltd Thermostatic safety valve
JP2007071411A (ja) * 2005-09-05 2007-03-22 Matsushita Electric Ind Co Ltd 貯湯式給湯装置
CN101210742A (zh) * 2006-12-30 2008-07-02 顾利平 强制循环热水锅炉用的旁通冷却结构

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109737608A (zh) * 2018-12-26 2019-05-10 合肥美的暖通设备有限公司 一种阀组件、热水器和阀组件的控制方法

Also Published As

Publication number Publication date
US20080230620A1 (en) 2008-09-25
EP1972860A3 (de) 2009-09-23
JP2008232478A (ja) 2008-10-02

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